Hertel MR34-0303.281 Chucking Reamer 0.77mm Solid Carbide

Product Description

The HERTEL MR34-0303.281 is a solid carbide chucking reamer designed for precision hole finishing in tight-tolerance applications. With a 0.77 mm reamer diameter and a diameter tolerance of 0.0000 to +0.0003 mm, this tool holds the dimensional accuracy required for close-fit bores in metal components. The spiral flute geometry with left-hand spiral direction promotes smooth chip evacuation, while the right-hand cutting direction drives consistent material removal. The straight shank is compatible with standard collet and drill chuck setups. At 50 mm overall length with a 7 mm flute length, this reamer is built for short, precise reaming passes in machining environments.

This chucking reamer is suited for machine shop and production machining operations where sub-millimeter bore finishing is required. The solid carbide construction handles hardened and abrasive workpiece materials that would accelerate wear on high-speed steel tooling. With four flutes and a bright uncoated finish, this tool is typically run in CNC machining centers, drill presses, or turret lathes where controlled feed rates and rigid setup conditions can be maintained. It is sized for micro-bore work in the 0.00 to 1.00 mm reamer diameter range.

Key Features

• Solid carbide construction for wear resistance in hardened and abrasive materials
• 0.77 mm reamer diameter with a tight tolerance of 0.0000 to +0.0003 mm
• Left-hand spiral flute for efficient chip evacuation during right-hand cutting
• Four flutes for improved surface finish and bore roundness
• Straight shank for use with standard collet chucks and drill chucks
• Bright uncoated finish suitable for use with cutting fluids across a range of workpiece materials

Compatibility

Designed as an OEM-style solid carbide chucking reamer for use in machine tool setups requiring straight shank, spiral-flute reamers in the sub-millimeter diameter range.

Installation Notes

Chucking reamers of this diameter should be installed by a qualified machinist in a rigid, concentric tool holder to minimize runout. Ensure the machine spindle and workpiece are properly secured before engaging the reamer. Use appropriate cutting fluid for the workpiece material to extend tool life and achieve the specified bore tolerance. Avoid hand-feeding at inconsistent rates, as this can cause chatter and compromise bore finish at this diameter.